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ABAP Keyword Documentation →  ABAP − Reference →  Calling and leaving program units →  Calling Programs →  Calling Executable Programs 

Flow of an Executable Program

The statement SUBMIT loads the called program in a separate internal session and starts a series of processes in the ABAP runtime environment that raise events and actions in the called program in the following order:

  • Program constructor event LOAD-OF-PROGRAM.
  • The start values defined using the addition DEFAULT in the statements PARAMETERS and SELECT-OPTIONS are passed to the relevant data objects. The start values of all other data objects are set before LOAD-OF-PROGRAM.
  • Reporting event INITIALIZATION.
  • The selection screen specified in selscreen_options is called if it contains at least one input field or button. If no explicit selection screen is specified, the standard selection screen is called. Here, the selection screens are processed in full. After the selection screen processing, the program flow is either continued or ended, depending on the last user action on the selection screen. Before the first event in selection screen processing, AT SELECTION-SCREEN OUTPUT, the values specified in selscreen_options are passed.
  • Reporting event START-OF-SELECTION
  • Various GET events, if the called program is associated with a logical database.
  • Reporting event END-OF-SELECTION.
  • The basic list is called.

    If the basic list is empty, the program is exited..

    If the basic list is a spool list, it is sent to the SAP spool system and the program is exited.

    If EXPORTING LIST TO MEMORY is specified in list_options, the basic lists is saved in the ABAP memory and the program exits.

    Otherwise, the basic list is a screen list and is displayed on the screen. User actions on a displayed screen list raise list events. The program is exited when the user exits the list display.
  • If no selection screen is displayed in step 4, because processing is performed in the background or not at all, the program flow is complete.

    If a selection screen is displayed in step 4, the runtime environment calls the called program again after exiting the basic list (or, if the basic list is empty, after ending the program). This loads the program again and the associated actions and events are performed again, starting with LOAD-OF-PROGRAM. In this new call, the runtime environment supplies the parameters, the selection criteria, and the dynamic selections of the selection screen between the events INITIALIZATION and AT SELECTION-SCREEN OUTPUT with the previous input values (other settings, such as whether the tabstrip page was active, are not passed). The program call is not ended until the user exits selection screen processing by choosing Back, Exit, or Cancel.

    • The called program can be exited in any of these steps by using the statement LEAVE PROGRAM and during list processing by using LEAVE LIST-PROCESSING.

    Other versions: 7.31 | 7.40 | 7.54


    Notes

    • After the events START-OF-SELECTION and END-OF-SELECTION, the obsolete event START-OF-EDITING or END-OF-EDITING is raised. It is possible to implement an event block for this event, but this is unnecessary.